Import cgit prototype from git tree

This enables basic cgit functionality, using libgit.a and xdiff/lib.a from git + a custom "git.h" + openssl for sha1 routines. Signed-off-by: Lars Hjemli <hjemli@gmail.com>
author: Lars Hjemli <hjemli@gmail.com> 2006-12-09 15:18:17 +0100
committer: Lars Hjemli <hjemli@gmail.com> 2006-12-09 15:18:17 +0100
commit: 0d169ada2ba81210ab1191a5f2212662e90db77e (patch)
tree: 402b54583db269323ebb28e5fbf2075c4c1b3d85 /cgit.c
1 files changed, 410 insertions, 0 deletions
diff --git a/cgit.c b/cgit.c
new file mode 100644
index 0000000..4c14f77
--- /dev/null
+++ b/cgit.c
@@ -0,0 +1,410 @@
+#include "cgit.h"
+
+static const char cgit_doctype[] =
+"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\n"
+"  \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n";
+
+static const char cgit_error[] =
+"<div class='error'>%s</div>";
+
+static const char cgit_lib_error[] =
+"<div class='error'>%s: %s</div>";
+
+
+char *cgit_root         = "/var/git";
+char *cgit_root_title   = "Git repository browser";
+char *cgit_css          = "/cgit.css";
+char *cgit_logo         = "/git-logo.png";
+char *cgit_logo_link    = "http://www.kernel.org/pub/software/scm/git/docs/";
+char *cgit_virtual_root = NULL;
+
+char *cgit_repo_name    = NULL;
+char *cgit_repo_desc    = NULL;
+char *cgit_repo_owner   = NULL;
+
+char *cgit_query_repo   = NULL;
+char *cgit_query_page   = NULL;
+char *cgit_query_head   = NULL;
+
+int cgit_parse_query(char *txt, configfn fn)
+{
+	char *t = txt, *value = NULL, c;
+
+	if (!txt)
+		return 0;
+
+	while((c=*t) != '\0') {
+		if (c=='=') {
+			*t = '\0';
+			value = t+1;
+		} else if (c=='&') {
+			*t = '\0';
+			(*fn)(txt, value);
+			txt = t+1;
+			value = NULL;
+		}
+		t++;
+	}
+	if (t!=txt)
+		(*fn)(txt, value);
+	return 0;
+}
+
+void cgit_global_config_cb(const char *name, const char *value)
+{
+	if (!strcmp(name, "root"))
+		cgit_root = xstrdup(value);
+	else if (!strcmp(name, "root-title"))
+		cgit_root_title = xstrdup(value);
+	else if (!strcmp(name, "css"))
+		cgit_css = xstrdup(value);
+	else if (!strcmp(name, "logo"))
+		cgit_logo = xstrdup(value);
+	else if (!strcmp(name, "logo-link"))
+		cgit_logo_link = xstrdup(value);
+	else if (!strcmp(name, "virtual-root"))
+		cgit_virtual_root = xstrdup(value);
+}
+
+void cgit_repo_config_cb(const char *name, const char *value)
+{
+	if (!strcmp(name, "name"))
+		cgit_repo_name = xstrdup(value);
+	else if (!strcmp(name, "desc"))
+		cgit_repo_desc = xstrdup(value);
+	else if (!strcmp(name, "owner"))
+		cgit_repo_owner = xstrdup(value);
+}
+
+void cgit_querystring_cb(const char *name, const char *value)
+{
+	if (!strcmp(name,"r"))
+		cgit_query_repo = xstrdup(value);
+	else if (!strcmp(name, "p"))
+		cgit_query_page = xstrdup(value);
+	else if (!strcmp(name, "h"))
+		cgit_query_head = xstrdup(value);
+}
+
+char *cgit_repourl(const char *reponame)
+{
+	if (cgit_virtual_root) {
+		return fmt("%s/%s/", cgit_virtual_root, reponame);
+	} else {
+		return fmt("?r=%s", reponame);
+	}
+}
+
+char *cgit_pageurl(const char *reponame, const char *pagename, 
+		   const char *query)
+{
+	if (cgit_virtual_root) {
+		return fmt("%s/%s/%s/?%s", cgit_virtual_root, reponame, 
+			   pagename, query);
+	} else {
+		return fmt("?r=%s&p=%s&%s", reponame, pagename, query);
+	}
+}
+
+static int cgit_print_branch_cb(const char *refname, const unsigned char *sha1,
+				int flags, void *cb_data)
+{
+	struct commit *commit;
+	char buf[256], *url;
+
+	commit = lookup_commit(sha1);
+	if (commit && !parse_commit(commit)){
+		html("<tr><td>");
+		url = cgit_pageurl(cgit_query_repo, "log", 
+				   fmt("h=%s", refname));
+		html_link_open(url, NULL, NULL);
+		strncpy(buf, refname, sizeof(buf));
+		html_txt(buf);
+		html_link_close();
+		html("</td><td>");
+		pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0, buf,
+				    sizeof(buf), 0, NULL, NULL, 0);
+		html_txt(buf);
+		html("</td></tr>\n");
+	} else {
+		html("<tr><td>");
+		html_txt(buf);
+		html("</td><td>");
+		htmlf("*** bad ref %s", sha1_to_hex(sha1));
+		html("</td></tr>\n");
+	}
+	return 0;
+}
+
+static void cgit_print_docstart(char *title)
+{
+	html("Content-Type: text/html; charset=utf-8\n");
+	html("\n");
+	html(cgit_doctype);
+	html("<html>\n");
+	html("<head>\n");
+	html("<title>");
+	html_txt(title);
+	html("</title>\n");
+	html("<link rel='stylesheet' type='text/css' href='");
+	html_attr(cgit_css);
+	html("'/>\n");
+	html("</head>\n");
+	html("<body>\n");
+}
+
+static void cgit_print_docend()
+{
+	html("</body>\n</html>\n");
+}
+
+static void cgit_print_pageheader(char *title)
+{
+	html("<div id='header'>");
+	htmlf("<a href='%s'>", cgit_logo_link);
+	htmlf("<img id='logo' src='%s'/>\n", cgit_logo);
+	htmlf("</a>");
+	html_txt(title);
+	html("</div>");
+}
+
+static void cgit_print_repolist()
+{
+	DIR *d;
+	struct dirent *de;
+	struct stat st;
+	char *name;
+
+	cgit_print_docstart(cgit_root_title);
+	cgit_print_pageheader(cgit_root_title);
+
+	if (!(d = opendir("."))) {
+		htmlf(cgit_lib_error, "Unable to scan repository directory",
+		      strerror(errno));
+		cgit_print_docend();
+		return;
+	}
+
+	html("<h2>Repositories</h2>\n");
+	html("<table class='list'>");
+	html("<tr><th>Name</th><th>Description</th><th>Owner</th></tr>\n");
+	while ((de = readdir(d)) != NULL) {
+		if (de->d_name[0] == '.')
+			continue;
+		if (stat(de->d_name, &st) < 0)
+			continue;
+		if (!S_ISDIR(st.st_mode))
+			continue;
+
+		cgit_repo_name = cgit_repo_desc = cgit_repo_owner = NULL;
+		name = fmt("%s/.git/info/cgit", de->d_name);
+		if (cgit_read_config(name, cgit_repo_config_cb))
+			continue;
+
+		html("<tr><td>");
+		html_link_open(cgit_repourl(de->d_name), NULL, NULL);
+		html_txt(cgit_repo_name);
+		html_link_close();
+		html("</td><td>");
+		html_txt(cgit_repo_desc);
+		html("</td><td>");
+		html_txt(cgit_repo_owner);
+		html("</td></tr>\n");
+	}
+	closedir(d);
+	html("</table>");
+	cgit_print_docend();
+}
+
+static void cgit_print_branches()
+{
+	html("<table class='list'>");
+	html("<tr><th>Branch name</th><th>Head commit</th></tr>\n");
+	for_each_branch_ref(cgit_print_branch_cb, NULL);
+	html("</table>");
+}
+
+static int get_one_line(char *txt)
+{
+	char *t;
+
+	for(t=txt; *t != '\n' && t != '\0'; t++)
+		;
+	*t = '\0';
+	return t-txt-1;
+}
+
+static void cgit_print_commit_shortlog(struct commit *commit)
+{
+	char *h, *t, *p; 
+	char *tree = NULL, *author = NULL, *subject = NULL;
+	int len;
+	time_t sec;
+	struct tm *time;
+	char buf[32];
+
+	h = t = commit->buffer;
+	
+	if (strncmp(h, "tree ", 5))
+		die("Bad commit format: %s", 
+		    sha1_to_hex(commit->object.sha1));
+	
+	len = get_one_line(h);
+	tree = h+5;
+	h += len + 2;
+
+	while (!strncmp(h, "parent ", 7))
+		h += get_one_line(h) + 2;
+	
+	if (!strncmp(h, "author ", 7)) {
+		author = h+7;
+		h += get_one_line(h) + 2;
+		t = author;
+		while(t!=h && *t!='<') 
+			t++;
+		*t='\0';
+		p = t;
+		while(--t!=author && *t==' ')
+			*t='\0';
+		while(++p!=h && *p!='>')
+			;
+		while(++p!=h && !isdigit(*p))
+			;
+
+		t = p;
+		while(++p && isdigit(*p))
+			;
+		*p = '\0';
+		sec = atoi(t);
+		time = gmtime(&sec);
+	}
+
+	while((len = get_one_line(h)) > 0)
+		h += len+2;
+
+	h++;
+	len = get_one_line(h);
+
+	subject = h;
+
+	html("<tr><td>");
+	strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", time);
+	html_txt(buf);
+	html("</td><td>");
+	char *qry = fmt("h=%s", sha1_to_hex(commit->object.sha1));
+	char *url = cgit_pageurl(cgit_query_repo, "view", qry);
+	html_link_open(url, NULL, NULL);
+	html_txt(subject);
+	html_link_close();
+	html("</td><td>");
+	html_txt(author);
+	html("</td></tr>\n");
+}
+
+static void cgit_print_log(const char *tip, int ofs, int cnt)
+{
+	struct rev_info rev;
+	struct commit *commit;
+	const char *argv[2] = {NULL, tip};
+	int n = 0;
+	
+	init_revisions(&rev, NULL);
+	rev.abbrev = DEFAULT_ABBREV;
+	rev.commit_format = CMIT_FMT_DEFAULT;
+	rev.verbose_header = 1;
+	rev.show_root_diff = 0;
+	setup_revisions(2, argv, &rev, NULL);
+	prepare_revision_walk(&rev);
+
+	html("<h2>Log</h2>");
+	html("<table class='list'>");
+	html("<tr><th>Date</th><th>Message</th><th>Author</th></tr>\n");
+	while ((commit = get_revision(&rev)) != NULL && n++ < 100) {
+		cgit_print_commit_shortlog(commit);
+		free(commit->buffer);
+		commit->buffer = NULL;
+		free_commit_list(commit->parents);
+		commit->parents = NULL;
+	}
+	html("</table>\n");
+}
+
+static void cgit_print_repo_summary()
+{
+	html("<h2>");
+	html_txt("Repo summary page");
+	html("</h2>");
+	cgit_print_branches();
+}
+
+static void cgit_print_object(char *hex)
+{
+	unsigned char sha1[20];
+	//struct object *object;
+	char type[20];
+	unsigned char *buf;
+	unsigned long size;
+
+	if (get_sha1_hex(hex, sha1)){
+		htmlf(cgit_error, "Bad hex value");
+	        return;
+	}
+
+	if (sha1_object_info(sha1, type, NULL)){
+		htmlf(cgit_error, "Bad object name");
+		return;
+	}
+
+	buf = read_sha1_file(sha1, type, &size);
+	if (!buf) {
+		htmlf(cgit_error, "Error reading object");
+		return;
+	}
+
+	buf[size] = '\0';
+	html("<h2>Object view</h2>");
+	htmlf("sha1=%s<br/>type=%s<br/>size=%i<br/>", hex, type, size);
+	html("<pre>");
+	html_txt(buf);
+	html("</pre>");
+}
+
+static void cgit_print_repo_page()
+{
+	if (chdir(cgit_query_repo) || 
+	    cgit_read_config(".git/info/cgit", cgit_repo_config_cb)) {
+		char *title = fmt("%s - %s", cgit_root_title, "Bad request");
+		cgit_print_docstart(title);
+		cgit_print_pageheader(title);
+		htmlf(cgit_lib_error, "Unable to scan repository",
+		      strerror(errno));
+		cgit_print_docend();
+		return;
+	}
+	
+	char *title = fmt("%s - %s", cgit_repo_name, cgit_repo_desc);
+	cgit_print_docstart(title);
+	cgit_print_pageheader(title);
+	if (!cgit_query_page)
+		cgit_print_repo_summary();
+	else if (!strcmp(cgit_query_page, "log")) {
+		cgit_print_log(cgit_query_head, 0, 100);
+	} else if (!strcmp(cgit_query_page, "view")) {
+		cgit_print_object(cgit_query_head);
+	}
+	cgit_print_docend();
+}
+
+int main(int argc, const char **argv)
+{
+	if (cgit_read_config("/etc/cgitrc", cgit_global_config_cb))
+		die("Error reading config: %d %s", errno, strerror(errno));
+
+	chdir(cgit_root);
+	cgit_parse_query(getenv("QUERY_STRING"), cgit_querystring_cb);
+	if (cgit_query_repo)
+		cgit_print_repo_page();
+	else
+		cgit_print_repolist();
+	return 0;
+}
author	Lars Hjemli <hjemli@gmail.com>	2006-12-09 15:18:17 +0100
committer	Lars Hjemli <hjemli@gmail.com>	2006-12-09 15:18:17 +0100
commit	0d169ada2ba81210ab1191a5f2212662e90db77e (patch)
tree	402b54583db269323ebb28e5fbf2075c4c1b3d85 /cgit.c